Thread-cutting device.



PATENTED MAR. l0, 1908.

N0.a81449. n

G. A. SMITH.`

THRBAD'GUTTING DEVICE. APPLICATION FILED JAN. 25. 1907.

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f: 5; Be lit?,knownrt'hat lIf,a,GnUsfl1/&yris iAxfSMmTHu a citizen `lof/.the 'United States; l residing @at Mar.- shalltowml in i1 thei ldoun'tyfr fof i; Marshall@` and yStateifiIowa',I 'have iniventedi a eertaininew Vandi useful Threadl-'Guttingfv lD'evice; of which Ithe followiiigisa speciiicationJHf- Ui @WW My invention relates to thread cuttingi'de.- sandvcon'sistis injgthelpeculianandadvan- '.ta'geous construction l :hereinafter @described landjclairhedjz ruil);sa-lumai? s pnl-sin! lvm @Inl ithe'fvdrawingsiwhichufbrmnp'art iherreof: I 'liguref 1- is afsideifelevationgbfva combination g ,tool'embcdyinl mynovelLthreadcuttingfdevice:kx lFig. Qrs owsfa similaiviewwithwthe movabler-hiandle member'slightly separated -fromvt'heizstationary i bneiar'dnraw [part: iof the xcombinationetozol brclren-Lawvy tovfshow fthe .constriictionrofitheiadjriistng deviclen il l1.' u.A l iReferringf` to:fthalaiceompanyingfrlrawingsl,` -Ifhave niseduthelrefernce l-numeralfrlO-itowiii- 'j dicate the body of the stationary handrle member? andi 1' Lito iinllicatelthei ibbdy y@f lthe j' mdzblelhandlernrlldz. The. latter is! pivoted to the former by meanseofatheip'ivotl pin 12 and the line ofrclivsionffthe two andle members is anrangil iemallstraight line 13 at about the longitudinal center of the handle. Near one end of the movable handle member, the division line extends toward the outer edge of the movable handle member at 14 and then substantially parallel with the division line 13 at the point marked 15 and then toward the edge of the tool at the oint marked 16. Between the edges of the body portions 10 and 11, I have formed the thread cutting dies 17. When the handle members are together, as shown in Fig. 1, the outer edges of the handle are of such shape as to be conveniently and easily grasped by an operator so that he may use the tool on either end of the handle. In the accompanying illustration, I have shown an alligator wrench of the ordinary type on each end of the handle, other tools may be substituted, if desired, the wrench itself forming no part of my present invention. I also desire it understood that appurtenances of all kinds may be omitted from the ends of the major portion or member of thebody of the device Without affecting 'my invention.

I have provided for adjusting the movable handle member relative to the stationary one as follows: The numeral 18 indicates a screw extended through a relatively large opening 19 in the movable handle mem- `of the tool by the operator.

N fbi j mai-'iin ',f 'b Hi'rL'Lthei lstationary i handleL o miernben l UUS-he lscrew; suprovidjediiwitln la'ihead QGoproviided ".wiith f a notclln g2 1l i te f neoeivei al' screw driver.. 'The fsaidfscrew dsl-first :seated: iin i diheaeserewy ithreadfed ibpenin'gi `lof.-y the;` stationary. 1handle i lsorewl 'in ,bviously byiturnin'gthe nutigathe i.

movable handlel memberfmay. be; forcedvtoiwardiandimtog engagement withnth astatinn- -aryihand'le imembervandi by tunrrirlgithe .lltlln -theiy ipposizteidirezctioni theI zmovableadiandlb memberawilli ibeg permitted@tooseparate;ifrom if the stationary one to thenpositionsshdwgnh 211siHowievera thel l2?) leannolt: bei remoxrelefromilthe fscrew. andinw paratnofalthle screw may` eprojectz-beyrondltheanutlsoiithlat ltlreneaarremrouglrlplacesfon projeting bolts than unghia im anyaway interfere; withsthbusl I-have also provided for movin .the movable handle member away from le stationary one when the nut 23 is unscrewed as follows: Formed in the adjacent portions of the handle members surrounding the screw 18 are the cylindrical recesses 24 and mounted on the screw within said recesses is the eXtensible coilA spring 25 with'its'ends designed to bear in opposite directions upon the handle members.

In practical use, the parts are assembled as follows: The movable handle member is first pivotally connected with the stationary one, then the screw 18 is irst passed through the 'nut 23, then through the opening in the movable handle member and it is screwed into the opening in the. stationary handle member by means of a screw driver until the end of the screw projects slightly beyond the edge of the stationary handle member. Then this end is upset or riveted, thus firmly holding the screw against movement. The spring is placed in its recess before the screw is inserted and the screw is passed through it. lWhen the nut is screwed down tight in the position, shown in Fig. 1, the tool may readily be grasped by the handle portion and used for any of the purposes for which it is intended and there will be no projecting CIK bolts or other devices that would at all interfere with the operators hand and furthermore none of the parts of the device can possibly become detached or lost. Then when it is desired to use the device as a thread cutter, a slight adjustment of the nut is suflicient to separate the stationary and movable handle members to the position desired.

It will be noticed by reference to Fig. 2 that the swinging end of the movable body member 1l is opposed to a lateral enlargement at one end ofthe main body member l0 at one side of the opposed spring-receiving recesses in the members, and that a shoulder or member ll is opposed to a shoulder on member l0 at the opposite side of said spring-receiving recesses. This is advantageous since it breaks the joint between the swinging end of member 1l and the member l0 and in that way contributes to the strengh of the device; and it is also advantageous because it assures proper registration of the die recesses in the inner edges of the body members and in combination with the hinge connection l2 precludes the imposition of lateral strain on the screw 18. It is further advantageous because it assures proper registration of the spring-receiving recesses in the members, and effectually avoids any lateral bending or deflection of the spring and consequent im airment thereof.

aving thus described my invention, what I claim and desire to secure by Letters Patent of the United States, therefor is- 1. A thread cutting device comprising a body member having a die-recess in its inner edge and also having a cylindrical recess in said edge, a second body member hinged to the iirst mentioned member and having a die-recess in its inner edge and also having a cylindrical recess in said edge, a screw lixed to the lirst mentioned body member and extending through the cylindrical recesses and loosely through an opening in the second mentioned member and having a head at its outer end, a nut mounted on thc screw, at the inner side of the head thereof, and havingr a recess receiving the head of the screw, and a coiled spring arranged in the cylindrical recesses of the members and surrounding thc screw and serving to hold the bottom of the recess in the nut against the head of thc screw.

2. A thread cutting device coniprising body members pivotally connected together and having a thread-cutting die formed in their adjacent edges, a screw iixedly connected to one body member and extending loosely through the other body member and having a head at its outer end, and a nut mounted on the screw, at the inner side of the head thereof, and having a recess receiving the head of' the screw; the screw, the nut and the body member adjacent to the nut being so relatively arranged that the head of the screw is contained at all times in the rccess of its nut.

Des Moines, Iowa, January 1S, 1907.

GUSTAVUS A. SMITH. Witnesses:

S. F. CHRISTY, RALPH ORWIG. 

